$\int_{-a}^{a} \sqrt{\frac{a - x}{a + x}} dx =$

  • A
    $\frac{a \pi}{2}$
  • B
    $1$
  • C
    $2 a \pi$
  • D
    $a \pi$

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વિધાન $(A)$: $\int_{\frac{\pi}{2}}^{\frac{3 \pi}{2}} [2 \sin x] dx = 0$,જ્યાં $[.]$ એ મહત્તમ પૂર્ણાંક વિધેય દર્શાવે છે.
કારણ $(R)$: $2 \sin x$ એ $\left[\frac{\pi}{2}, \frac{3 \pi}{2}\right]$ અંતરાલમાં ઘટતું વિધેય છે.

સંકલન $\int_0^{\frac{\pi}{4}} \frac{x \, dx}{\sin^4(2x) + \cos^4(2x)}$ નું મૂલ્ય કેટલું થાય?

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